Improvement in valves for steam-pumps



J'. W; M'ATH IESON.

VALVE-S BOB. STEAM-PUMPS,

-NQ. 18 9,3701, Patented April 10, 1877.

WITNESSES: INIENTUB:

N-PETERS, priorcnuinudmmen, WASHINGTON. D. C.

UNITED STATES PATENT OFFICE,

JAMES W. MATHIESON, OF BROOKLYN, NEW YORK.

IMPROVEMENT IN VALVES FOR STEAM-PUMPS.

Specification forming part of Letters Patent No. 189,370, dated April10, 1877; application filed December 23, 1876.

To all whom it may concern Be it known that I, JAMES W. MATHIESON, ofBrooklyn, in the county of Kings and State of New York, have invented anew and useful Improvement in Pumps, of which the following is aspecification Figure 1 is a vertical of my improved pumping-engine. Fig.2 is a bottom view of one of the valves. Fig. 3 is a side view of thesame. Fig. 4 is an end view of the same.

Similar letters of reference indicate corresponding parts.

The invention will first be described in connection with the drawing,and then pointed out in the claim.

A is the cylinder. B is the piston, and G the piston-rod. D E are theports or passages leading from the end parts of the cylinder A to thevalve-chest F. The valvechamber is divided into two parts by ahorizontal partition, f and the lower and smaller part is divided intotwo compartments by a vertical partition, f into which compartments theports or passages D E open. In the bottom of the valve-chamber F, uponthe opposite sides of the vertical partition f are formed openingsleading to the inlet G, which openings are closed by two valves, H. Inthe horizontal partition f upon the opposite sides of the verticalpartition f, are formed two openings leading from the lower to the uppercompartments of said valve-chamber, which openings are closed by twovalves, H. The four valves H are made long, extending from side to sideof the valve-chamber F, and. are made V-shaped in their cross-section,as

longitudinal section shown in Figs. 1 and 4, so that they may offer theleast possible obstruction to the passage of the water.

In working the pump, when the piston B is moving in the directionindicated by arrow 1, the water in front of said piston will he forcedout through the passage E, will raise the upper left-hand valve H, andflow out through the discharge-opening I, as indicated by arrows 2. Atthe same time the vacuum formed in the rear of the piston B will causethe water to be forced in through the inlet G by atmospheric pressure,which water will raise the lower right-hand valve H, and pass throughthe passage D to the cylinder A, as indicated by arrows 3, to be forcedout again by the return stroke of the piston, the diagonal valves thusworking together. The ends of the valves H are notched, as shown inFigs. 2, 3, and 4, to receive the guide-bars or keys J, upon which thesaid valves move up and down, and which, when the valves become worn,can be removed and replaced by new ones, so that the said valves kepttight. c

Having thus described my invention, 1 claim as new and desire to secureby Letters Patent- A pump whose valves and valve-seats extend from sideto side of chamber F, and are made of V shape, substantially as and forthe purpose specified.

JAMES W. MATHIESON.

Witnesses JAMES T. GRAHAM, G. SEDGWIGK.

can be readily

